Kognity IB Physics A.0 Measurements & Uncertainty - 无忧得胜-网上国际课程 (5edu.win)

标记此题

1#

单选题 ( 1.0 分) (组内1/10) 切至整卷模式搜藏此题

第 1 题组 (共 10 题 10 分)

Which of the following7p os bmf 9og9ncu,mp0vo/0w.61yxxm could be a unit of power?

A. $kg \cdot m \cdot s^{-2}$

B. $kg \cdot m^2 \cdot s^{-1}$

C. $kg \cdot m^2 \cdot s^{-2}$

D. $kg \cdot m^2 \cdot s^{-3}$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

2#

单选题 ( 1.0 分) (组内2/10) 切至整卷模式搜藏此题

By approximately how many powers of t zus/-kjxz48;:a +tc el znpx2en is the height of a human larger than the height oxt zlpeaz :+;2/uzxnj c8sk4 -f a grain of sand?

A. -3

B. 2

C. 3

D. 1000

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

3#

单选题 ( 1.0 分) (组内3/10) 切至整卷模式搜藏此题

What is the value offd5zlcw;r4j* 0y-0uzhs k 1ex $\frac{6.3 \mu \mathrm{m} \times 10 \mathrm{GN}}{2.1 \mathrm{~ms}} ?$

A. $30$

B. $30 \; W$

C. $3 \times 10^7$

D. $3 \times 10^7 \; W$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

4#

单选题 ( 1.0 分) (组内4/10) 切至整卷模式搜藏此题

Which of the following is -r9ub9oy t mjvgmnd)/ gh ,s1xmr7 za7puu(;7 a fundamental unit in the SI system?

A. kevin

B. volt

C. coulomb

D. joule

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

5#

单选题 ( 1.0 分) (组内5/10) 切至整卷模式搜藏此题

The volume of the Earth is appr)r-hk 2z6 m 0oqt i7p27fmlrqce79wheoximately $10^{12} \mathrm{~km}^3$ and the volume of a grain of sand is approximately $1 \mathrm{~mm}^3$. To the nearest order of magnitude, if the Earth was hollow, how many grains of sand could it contain?

A. $10^{12}$

B. $10^{18}$

C. $10^{24}$

D. $10^{30}$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

6#

单选题 ( 1.0 分) (组内6/10) 切至整卷模式搜藏此题

A farmer in Tanzania has an average life expectancy of 62 years. Which of the following is an estimate of his lifetime in seconds?

A. $10^5$

B. $10^7$

C. $10^9$

D. $10^{11}$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

7#

单选题 ( 1.0 分) (组内7/10) 切至整卷模式搜藏此题

Estimate, to the nearest order of magnst;.0rew ;vtirb7 f;xitude, the number of heartbeats of an average adult0xr;iv sr.f7;;wt etb human in a day.

A. $10^4$

B. $10^5$

C. $10^6$

D. $10^7$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

8#

单选题 ( 1.0 分) (组内8/10) 切至整卷模式搜藏此题

Which of the following contains one fundamental unit and one d :qrz4 )iw(oyz5 f2rp+c,vjhp6 i2s wwerived unit?

A. volt, kelvin

B. metre, second

C. ampere, kelvin

D. coulomb, newton

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

9#

单选题 ( 1.0 分) (组内9/10) 切至整卷模式搜藏此题

If A=10.0 and B=0.50, which calculs k 8:mcu4*yuzation will give the answer with the most decimal ps8yc u 4mz*:kulaces?

A. $A \times B$

B. $A/B$

C. $A^2$

D. $B^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

10#

单选题 ( 1.0 分) (组内10/10) 切至整卷模式搜藏此题

A car has a mass of 1000kg. A mouse has a mass of 10g. What is the order of rtm.),iya : vcys62qe magnitude of the ratio between the mass of the car to that of vc 2etyy.:rqm, 6as)ithe mouse?

A. -5

B. 5

C. $10^{-5}$

D. 100000

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

11#

填空题 ( 1.0 分) (组内1/29) 切至整卷模式搜藏此题

第 2 题组 (共 29 题 29 分)

A train travels $62.4 \pm 0.7$ meters in $7.748 \pm 0.05$ seconds. What is the absolute uncertainty in its speed? (数值) (Leave your answer to two significant figures, without units and without the $\pm$ symbol.)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

12#

填空题 ( 1.0 分) (组内2/29) 切至整卷模式搜藏此题

A water tank is the shape of a cube witho 3mjlcbv n/r5 tk0j pz960:+kn(svnv sides of $2.57 \mathrm{~m}$. Each side is measured with an uncertainty of $0.4 \%$. What is the absolute uncertainty in the volume of the tank? (数值) (Give your answer without a unit and to 2 significant figures)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

13#

填空题 ( 1.0 分) (组内3/29) 切至整卷模式搜藏此题

A pyramid has a squareo-axy .x- wla5 base of side $x$ and height $h$. The volume $V$ of the pyramid is given by the expression:
$$V=\frac{x^2 h}{3}$$
If $V$ is measured to $8.7 \%$ and $h$ is measured to $1 \%$, what is the percentage uncertainty of $x ?$ (数值) % (Remember to exclude the $\%$ symbol with your answer)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

14#

单选题 ( 1.0 分) (组内4/29) 切至整卷模式搜藏此题

The length of a pencil is measured using part of a metre r3 +decaasw+ 9p 6x5,q8j+vxhmob 2 ckbule that is graduated in millimetres2bxemh6,pcx+v8 k3+qsbwo c+ j95ad a, as shown below.

What is the length of the pencil?

A. $(6.00 \pm 0.10) \; cm$

B. $(6 \pm 0.1) \; cm$

C. $(6 \pm 0.05) \; cm$

D. $(6.00 \pm 0.05) \; cm$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

15#

填空题 ( 1.0 分) (组内5/29) 切至整卷模式搜藏此题

The volume $V$ of a cone of height $h$ and radius $r$ is given by the expression:
$$V=\frac{\pi r^2 h}{3}$$
In a particular experiment, there is a $5.3 \% $ uncertainty in $V$ and a $2.0 \%$ uncertainty in $r$. What is the percentage uncertainty in $h$ ? (数值) % (Remember to exclude the $\%$ symbol with your answer)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

16#

填空题 ( 1.0 分) (组内6/29) 切至整卷模式搜藏此题

The radius of a balloon is measurepuu-g5kf h1k,b), wwi y4q0rcd to be $29.6 \pm 0.9 \; cm$. What is the percentage uncertainty in the calculated volume of the balloon? (数值) % (Remember to keep three significant figures and exclude the $\%$ symbol with your answer and treat the balloon as a sphere)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

17#

填空题 ( 1.0 分) (组内7/29) 切至整卷模式搜藏此题

The period $T$ of oscillation of a pendulum of length $l$ is given by:
$$T=2 \pi \sqrt{\frac{l}{g}} .$$
If the uncertainty in $g$ is $1.6 \%$ and the uncertainty in $l$ is $5.5 \%$, what is the percentage uncertainty in $T$ ? (数值) % (only fill in numerical value without the % sign and keep two significant figures)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

18#

填空题 ( 1.0 分) (组内8/29) 切至整卷模式搜藏此题

The lengths of the side9 opbf1u,9xbb8q1 t n.kyb4fts of a room are estimated as $10.0 \mathrm{~m}, 4.0 \mathrm{~m}$ and $3.0 \mathrm{~m}$, each with an uncertainty of $\pm 11 \%$. What is the absolute uncertainty in the volume of the room? (数值) $m^3$ (Give your answer in $\mathrm{m}^3$ to two significant figures, without a unit.)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

19#

填空题 ( 1.0 分) (组内9/29) 切至整卷模式搜藏此题

The potential differtr9kanb;gp9nmi 8i hse3 -17qence ($V$) across a resistor is measured with a digital voltmeter to be $0.50 \; V$ . What is the percentage uncertainty in $V^2$ ? (数值) % (only put numerical values in the blank and keep two significant figures.)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

20#

单选题 ( 1.0 分) (组内10/29) 切至整卷模式搜藏此题

By averaging three measuremen8kx gl.oc*;b 80 r4eeg* lzabats of the same quantity which of the following can be reduzkbl r80gg ;e*alex*. 4c8b aoced?

A. Random errors

B. Systematic errors

C. Random & systematic errors

D. Zero errors

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

21#

单选题 ( 1.0 分) (组内11/29) 切至整卷模式搜藏此题

A student measures a distance four times. k,orv4(2ing8e kjt/q The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. Whao(qt ,eij k4 8nkrv2g/t is the best estimate of this measurement?

A. $37.8 \pm 0.2 \; cm$

B. $37.8 \pm 0.4 \; cm$

C. $38.0 \pm 0.2 \; cm$

D. $38.2 \pm 0.4 \; cm$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

22#

单选题 ( 1.0 分) (组内12/29) 切至整卷模式搜藏此题

A student measures two lengtze7 t:+5sipr6 oro ka;; 9pasahs as follows: $$a = (10 \pm 0.1) \; cm$$ $$b = (20 \pm 0.1) \; cm$$
Which of the following quantities has the largest percentage uncertainty?

A. $a$

B. $b$

C. $a+b$

D. $a-b$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

23#

单选题 ( 1.0 分) (组内13/29) 切至整卷模式搜藏此题

The time for two events, a and b, are 52lo a+v2bghvq8 t;gkmeasured to be $(5.1 \pm 0.1)s$ and $(4.9 \pm 0.1)s$ respectively. In which of the following quantities is the fractional(percent) uncertainty the smallest?

A. $a+b$

B. $a-b$

C. $a \times b$

D. $a/b$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

24#

单选题 ( 1.0 分) (组内14/29) 切至整卷模式搜藏此题

The variation of quantity P as quantity Q varies iir -pg3k kcl0k5 msosy/f9x7 *s plotted. Theory states that P ssls3rcpf 79/0y5k-xk k*gmi o hould vary linearly with Q.

A. The systematic errors are substantial.

B. The random errors are substantial.

C. The random errors and the systematic errors are insignificant.

D. The random errors and the systematic errors are substantial.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

25#

单选题 ( 1.0 分) (组内15/29) 切至整卷模式搜藏此题

The length of a pencil is measured using part of a g dhhabw+:j1,z.i;eq tqn-i )measuring tape as shown below., a-h n;ghe:zibwjidt+)qq.1

What is the length of the pencil?

A. $4.5 \pm 0.1 \; cm$

B. $11.5 \pm 0.2 \; cm$

C. $11.5 \pm 0.3 \; cm$

D. $11.5 \pm 0.5 \; cm$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

26#

单选题 ( 1.0 分) (组内16/29) 切至整卷模式搜藏此题

The masses and weights of different objects are independently measured p 6v 6rw4e +nlzj/(,0fwlxrow:x*kvd. The graph is a plot of weight vo/ xdrr( w+zwe:kx,6nvvfp 4*lj6l0 wersus mass that includes error bars.

What do these experimental results suggest?

A. The weight of an object is inversely proportional to its mass.

B. The measurements show a significant random error but small systematic error.

C. The measurements show a significant systematic error but small random error.

D. There is no correlation between the weights and the masses of the objects.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

27#

单选题 ( 1.0 分) (组内17/29) 切至整卷模式搜藏此题

The resistance $R$, and cross-sectional area $A$, of equal lengths of wire are measured at constant temperature and a graph of $R$ against $\frac{1}{A}$ is plotted. Which one of the following graphs would be obtained if $R$ is directly proportional to $\frac{1}{A}$ and if there is a significant systematic error in the measurement of $R ?$

本题所包含的其它图片:

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

28#

填空题 ( 1.0 分) (组内18/29) 切至整卷模式搜藏此题

The lengths of the si4+twa py)oq9+c7nefs/pjuf1 w+:p cmdes of a rectangular plate are measured, and the diagram shows the measurf+) pq stea1 c nwpuyw74pf:m+/j9c+ oed values with their uncertainties.

What is the percentage error in the area of the plate? %. (Remember to exclude the % symbol with your answer.)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

29#

填空题 ( 1.0 分) (组内19/29) 切至整卷模式搜藏此题

The density of a solid sphere is measured with percentage uncertainty of 8%.t/ry kq o. ww*3b3x:ek The rat33/*yb: oex kwk wq.rdius of the sphere is 2.3 ± 0.1 cm. What is the percentage uncertainty in the mass of the sphere? (数值) % (Please do not include the % simbol in the blank)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

30#

单选题 ( 1.0 分) (组内20/29) 切至整卷模式搜藏此题

Experimental data has sstk+w imul1 5 *jlh6-ew5i4c bhown that:
$$
P=\frac{g h^2}{u^3}
$$
where $g$ is a constant. If the percentage uncertainties in $h$ and $u$ are $a$ and $b$ respectively, what is the percentage uncertainty in $P ?$

A. $2a + 3b$

B. $2a - 3b$

C. $(2a/3b)$

D. $a^2/b^3$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

31#

单选题 ( 1.0 分) (组内21/29) 切至整卷模式搜藏此题

An experiment used to measure the acceler ,po7i2 w7g 7vvv0bvr u4o)leet-a or8ation due to gravity produces the follow,ebpl4toe0w8io- 7 o27 rurgv)vva7ving results:
$\begin{array}{llllllllll}7.83 & 6.98 & 7.52 & 8.01 & 7.76 & 7.15 & 6.87 & 7.25 & 8.35 & 7.54\end{array}$
Which of the following statements is true about these data?
Are there random or systematic errors, both, or neither?
(Acceleration due to gravity, $g$, on Earth is usually taken as $9.81 \mathrm{~m} \mathrm{~s}^{-2}$ ).

A. There is a large random error, but no systematic error.

B. There is a large systematic error, but a small random error.

C. There are large random and systematic errors.

D. There is a small random error and no systematic error.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

32#

填空题 ( 1.0 分) (组内22/29) 切至整卷模式搜藏此题

A rectangle was drawn using a ruler, such that each measurement has an uncer0l:ie- hp lk .g- awsabm)a25:ciy y(stainty : y.gaeb(-ia: i) 0c lms a2sw5l-kphyof $0.5 \mathrm{~cm} .$

What is the absolute uncertainty in the area of the entire rectangle (i.e. combined small and big rectangles), in $\mathrm{cm}^2$ ? $cm^2$ (Do not write units with the answer. Give your answer to 2 significant figures.)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

33#

填空题 ( 1.0 分) (组内23/29) 切至整卷模式搜藏此题

For an object of mass5e ls 60u9cura $(2.0 \pm 0.1) \mathrm{kg}$, what percentage uncertainty in the velocity will give a $6.7 \%$ uncertainty in the kinetic energy ($KE = \frac{1}{2}mv^2$) ? (数值) % (do not include the percent sign in your final result)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

34#

单选题 ( 1.0 分) (组内24/29) 切至整卷模式搜藏此题

An ammeter has a non-negl1, nq4)go*wzi+hh itsroy ) 7ohtb)j8igible zero offset error. Which of the following statements is coowoi4o)bz)8 7sqig h,hrtt j y+1n*)h rrect?

A. The readings from the ammeter will be accurate but not precise.

B. The readings from the ammeter will be neither accurate nor precise.

C. The readings from the ammeter will be precise and accurate.

D. The readings from the ammeter will be precise but not accurate.

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

35#

填空题 ( 1.0 分) (组内25/29) 切至整卷模式搜藏此题

A student measures a length five ti3+ x,, .ufqgsa.wves n lwk-y4mes. All of the measurements lie between $18.8 \mathrm{~cm}$ and $19.2 \mathrm{~cm}$. What should the student quote as the absolute uncertainty in the length? The absolute uncertainty is $cm$ (Do not include the $\pm$ symbol nor the unit)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

36#

单选题 ( 1.0 分) (组内26/29) 切至整卷模式搜藏此题

A piece of string 9.5 ± 0.3 cm lo-:;6 a(sd)nq t jt 30mjzsgejung is cut from a longer piece that is 12.6 ± 0.3 cm s: )z0(6q-jtju snm;geatj d3long. How long is the remaining piece of string?

A. $3.1 \pm 0.3 \; cm$

B. $3.1 \pm 0.4 \; cm$

C. $3.1 \pm 0.6 \; cm$

D. $3.1 \pm 0.7 \; cm$

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

标记此题

37#

填空题 ( 1.0 分) (组内27/29) 切至整卷模式搜藏此题

A current of value $I$ flows through a resistor of resistance $R$ and the power dissipated is $I^2 R$. The value of $I$ has an uncertainty of $\pm 2 \%$ and the value of $R$ has an uncertainty of $\pm 4 \%$. What is the percentage uncertainty in the calculated power dissipation? (数值) % (Give your answer correct to two significant figures without the % sign.)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案:

进入本题讨论区，参与讨论

标记此题

38#

填空题 ( 1.0 分) (组内28/29) 切至整卷模式搜藏此题

A force of 10.0 ± 0.4 N is applied to cq u-v+du/)xegjw(: ra mass of 2.0 ± 0.23 kg, causing it to accelerate. What is the percentage uncertainty od j: u veu-w/c)+xqrg(f its acceleration? (数值) % (do not include the percent sign in your result)

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

本习题练习题目来源于无忧得胜-网上国际课程 (https://5edu.win)，学生可刷题练习，扫右侧二维码或加微信skysky1258，获取更多资料
教师可以抽题组卷或一键复制本试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

标记此题

39#

填空题 ( 1.0 分) (组内29/29) 切至整卷模式搜藏此题

The radius of a circle of wire is measureyhesn up 4q1-mzul w/bqac/.6; - j/tgd to be 10.0 ± 1.1 cm.
What is the percentage error in the area of the loop? (数值) %
What is the percentage error in the circumference of the loop? (数值) %

绑定到本题的附件链接:
绑定到本题的上传图片:

参考答案: 查看本题详细解析

进入本题讨论区，参与讨论

账号		自动登录	找回密码
密码			立即注册

网页聊天 (离线可收发)

加微信咨询 (申请一对一课程辅导，加本站学习交流群）

电话咨询：

联系管理员：

查看帮助：

未使用图片

本次作答已使用

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39